AMD-K6 Datasheet, PDF (57/346 Pages) Advanced Micro Devices – AMD-K6 Processor

20695H/0—March 1998
Preliminary Information
AMD-K6^® Processor Data Sheet
Write Handling Control Register (WHCR). The Write Handling Control
Register (WHCR) is a MSR that contains three fields — the
WCDE bit, Write Allocate Enable Limit (WAELIM) field, and
the Write Allocate Enable 15-to-16-Mbyte (WAE15M) bit.
Figure 32 shows the format of WHCR. See “Write Allocate” on
page 177 for more information.
63
9 87
10
W
A
0
WAELIM
E
1
5
M
Reserved
Symbol
WCDE
WAELIM
WAE15M
Description
Bits
Always program to 0
8
Write Allocate Enable Limit
7–1
Write Allocate Enable 15-to-16-Mbyte 0
Note: Hardware RESET initializes this MSR to all zeros.
Figure 32. Write Handling Control Register (WHCR)
Memory
Management
Registers
Th e A M D -K 6 p ro c e s s o r c o n t ro l s s e g m e n t e d m e m o ry
management with the registers listed in Table 6. Figure 33 on
page 40 shows the formats of these registers.
Table 6. Memory Management Registers
Register Name
Global Descriptor Table Register
Interrupt Descriptor Table Register
Local Descriptor Table Register
Task Register
Function
Contains a pointer to the base of the Global Descriptor Table
Contains a pointer to the base of the Interrupt Descriptor Table
Contains a pointer to the Local Descriptor Table of the current task
Contains a pointer to the Task State Segment of the current task
Chapter 3
Software Environment
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